Electric-arc lamp



(No Model.)

H. 0. SWOBODA.

ELECTRIC ARG LAMP.

No. zfhgol. Patented 001;. 23,1894.

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UNrrEE STATES PATENT OEErcE.

HANS OTTO SWOBODA, OF NEW YORK, N. Y., ASSIGNOR TO THE GENERAL INOANDESCENT ARC LIGHT COMPANY, OF NEW YORK.

ELECTRIC-ARC LAM P.

SPECIFICATION forming part of Letters PatentyNo. 527,901, dated October 23, 1894.-

Application led March 2, 1394. Serial No. 502,046. (No model.)

o @ZZ whom t may concern:

Be it known that I, HANS OTTO SwoBoDA,

a subject of the Emperor of Germany, residing in the city of New York, in the county and State of New York, have invented a certain new and useful Improvement in Electric-Arc Lamps, of which the following is a specification.

I will describe a lamp embodying my invention and then point out the novel features in the claims. n

In the accompanying drawings Figure l is a side view of a lamp embodying my improvement. Fig. 2 is a side view of parts shown in Fig. 1, but they are here represented as they appear ina plane at right angles to Fig. l. Fig. Bris, aV top View, and Fig. 4 is a side view of a balance lever analogous in its action to a penduluml and used in connection with an escapement to control the feed of the upper carbon.

Similar letters of reference designate corresponding parts in all the figures. Y

As my improvement does not relate to the circuit of the lamp, or to the construction of the frame, I shall not describe these features except incidentally in explaining other parts.

A A2 designate two rods extending from a plate A, down to a holderfor the lower carbon. As the latter may be of any suitable construction, I have not shown it. One of the rods A A2 may be hollow to receive a circuit wire B, covered with insulating material.

C designates another plate which is connected to the plate A, by means of intermediate rods, or otherwise. It is shown as having a central hub in which a rod D is fitted. The rod D, may serve as a support for the lamp. I have shown the plate C, as provided with binding screws c c2 for the connection of the circuit or line wires leading to and from the lamp. .I may add that both these binding screws are insulated from the plate C. The wire B is connected with the binding screw c.

I will now particularly describe the form of lamp illustrated by Figs. 1 and 2.

E designates a rod, which is to be provided at the'lower end with a holder for the upper 5o carbon, its office being to support said carbon.

vIt will be seen that this rod is provided with a rack e on one side and that it moves up- ;wardly through a hole in the center of the plate A. It may be guided by a bearing in a plate F, which is mounted upon the plate A, and also by a bearing in a plate F which is supported above the plate F and connected with it by means of two vertical plates or pieces F2 F2. This rod E may also pass upwardly through the plate O and into the rod 6o D, providing the latter is made tubular, which will preferably be the case. The downward movement of the rod may be limited by a cross-pin arranged in its upper portion, so that it may contact with the plate F.

With the rack e of the rod E, engages a gear wheel G, which is supported in bearings with which the side pieces F2 F8 are provided. As here shown, these bearings consist of screws passing through the side pieces and 7o engaging with the ends of a shaft g, upon which the said gear wheel is aflixed.

The shaft g forms a support for an oscillating frame H, here shown as consisting of two angular or L-shaped side pieces h h2, 75 and intermediate cross-pieces or stretchers h2. As here shown, these side pieces are loosely mounted upon this frame and loosely mounted upon the said shaft g.

G designates a pinion afxed toa shaft g 8o v journaled in the side pieces of the frame H.

Aftixed to this pinion G is a ratchet wheel G2, and with this is combineda pawl G3, which is pivoted to a stud extending from the side of a gear wheel G4, the latter being loosely S5 mounted upon the shaft g. Aspring g2 holds the pawl in engagement with the ratchet wheel.

When the rod E is moved upwardly, itwill rotate the pinion G', and consequently the 9o ratchet wheel G2,but tlie'latter will play past the pawl G3 and hence no motion will beimparted to the gear wheel G4. A downward movement of the rod E, will, however,impart motion to the gear wheel G4 as well as to the 95 pinion G.

The gear wheel G4 engages with a pinion G5, affixed to a shaft g2, which is journaled in bearings in the side pieces of the frame H. On this shaft g3 is also affixed an escapement roo wheel G6, with which is combined an escapement G7, the latter being affixed to an oscillating shaft g4 which is journaled in bearings provided on the side pieces of the frame H. This shaft gL has affixed to it an angular balance lever G8, acting as a pendulum. Obviously the frame H can oscillate about the axis of the shaft g.

The balance lever Gs is provided with a laterally extending pin g8. When the frame is in its normal position or, in other words, iu the position which it occupies when there is no current on the lamp, and also at times when the feeding of the upper carbon bccomes necessary, this pin will be beyond a plate GD and hence will not be controlled by the latter, but when the frame H is oscillated outof this position, the pin g8 will be moved along the said plate G0 and by reason of this it will be prevented from oscillating and the gearing, as also the downward movement of Ithe rod E, will be stopped.

The plate G9 is supported by an appurtenance of one of the side pieces F2 F3 of the frame F F F2 F3. This appurtenance is shown as made in the form of an arm, which is pivotally connected near one end by means of a screw Q20 to one of the side pieces of the frame F F F2 F3, and has a slot g21 which is curved concentrically with said pin or screw g2", through which passes a clamp or screw Q22, that engages with the said frame. Thus I provide for adjusting the plate Gg into different positions to adapt the lamp for different currents. The screw g20 is concentric with the shaft G.

Vhen the frame H oscillates, the pinion G will impart motion to the gear wheel G, and hence will produce a vertical movement of the rod E.

The frame H is connected with the core or armature J of a solenoid or magnet J. As here shown, the frame H has a lateral connection in the form of a rod h5, and a spring h6 extends from this to the core J. Instead of this flexible connection there may, however, be a rigid connection between the frame and the core. This core J is composed of a number of iron wires j, insulated from each other in any suitable manner, as for instance by being coated or oxidized. If desired, these wires may be surrounded by a single glass sleeve. These wires j are fitted at their ends into cap-pieces j 7'2 which may be made of insulating material or metal, but if metal is employed and the lamp is intended for an alternating current, there should be a split in each of the cap-pieces lengthwise of the core and to the center. I do not want to be limited, however, to the use of a core made in this manner, as I may use a solid iron core, or alaminated iron core. If a solid iron core is used and the lamp is employed for an alternating current, the core should be split lengthwise.

The core J works within the solenoid or magnet J, which may have a series of differential winding. This winding will be connected in a lamp circuit in any suitable manner. As here shown, one of the wires extending from the winding connects with one of the side pieces F2 F3 of the frame F F F2 F3. Obviously the horseshoe form of magnet instead of the solenoid form, may be employed.

When the solenoid or magnet J, draws its core or armature upward, the frame H will be oscillated in such direction as to effect an upward movement of the rod E, and consequently of the upper carbon. In this way the arc is established. As the resistance of the arc increases, the core or armature will be allowed to move downward so as to lower the upper carbon. On moving down far enough it will cause the gearing to be released, so that the rod E may feed downward.

Preferably a dash-pot K will be combined with the frame I-I, and some stationary partof the lamp frame. In the present instance, its cylinder is connected to an appurtenance of one of the side pieces F2 F3 of the frame F F F2 F2, and its piston to a lateral extension on the frame H. The purpose of this dash-pot is to prevent too sudden movements of the frame H.

In the form of lamp shown by Figs; l and 2, the circuit extends through the frame F F F2 F3 and from such frame, by means of a metal brush Il, to the rod E, which carries the upper carbon.

In Figs. 3 and 4, I have shown a different style of balance lever. In this form of balance lever there isa lateral projection or pin Q9, which is pivotally connected by a pin g10 to the lever and held in its normal position by a spring g11 which bears upon it and is affixed to the lever. This lateral projection or pin g9 is advantageously made yielding so as to prevent it from being rendered inoperative by engaging-with the end of the plate Gf.

That I claim as my invention, and desire to secure by Letters Patent, is

. l. In an are lamp, the combination of a movable carbon support,a rotary part connected with such support, a tilting frame, a solenoid or magnet for controlling the movement of the tilting frame, an escapement, escapernent wheel and balance lever carried by said tilting frame, said escapement having a laterally projecting pin, mechanism under the control of the escapement carried by said tilting frame and having a pawl and ratchet connection with said rotary part, a fixed frame, and an arm extending therefrom provided with a laterally projecting arc shaped flange at one end which coacts with the pin of said escapement to prevent movement of the latter in such a manner as not to interfere with the movement of thetilting frame, substantially as specified.

2. In an arc lamp, the combination of a movable carbon support, a rotary part connected with such support, a tilting frame,asolenoid or magnet forl controlling the movement of the tilting frame, an escapement, escapement wheel and balance lever carried by said tilt- IOO IIO

ing frame, said escapement having a laterally projecting pin, mechanism under the control of the escapement carried by said tilting frame and havinga pawl and ratchet connection with said rotary part, a fixed frame, and an adjustable arm extending therefrom provided with a laterally projecting arc shaped flange at one end which coacts with the pin of saidy escapement to prevent movement of the latter in such a manner as not to interfere with the movement of the tilting frame, substantially as specied.

3. In an arc lamp, the combination of a movable carbon support, a device for controlling the movement of the same, a magnet or solenoid, a tilting frame connected with the armature or core of the magnet or solenoid mechanism carried by said tilting frame and In testimony whereof I have signed my name to this specification in the presence of 3o tWo subscribing Witnesses.

HANS OTTO SWOBODA.

Witnesses:

EDWIN H. BROWN, ANTHONY GREF. 

